Scared to put the medicine in my vag for my yeast infection! Help :(?

So, I have an awful yeast infection and decided to go buy some medicine for it. But when I opened it up, I saw this long thing that the medicine goes into, and I'm suppost to put it far up my vagina and squirt the medicine in. I'm so scared cause when I tried it felt like it couldnt get in at all :( I think it may be just because I'm scared but I dont know. I cant even use tampons :( I feel so pathetic that I'm scared to put things up there.. Help please?
No, its not a douche.
Its like this: http://www.google.com/imgres?imgurl=http://www.topmedicalsupply.com/images/P/bb89728c-01.jpg&imgrefurl=http://www.topmedicalsupply.com/oral-syringe-w-tube-item-104-213-p.html&usg=__RDVyt4S8CfPcEezwX7umxt0G-XU=&h=350&w=350&sz=10&hl=en&start=0&zoom=1&tbnid=NZwL5DuNeHx8iM:&tbnh=144&tbnw=141&prev=/images%3Fq%3Dmedicine%2Btube%26um%3D1%26hl%3Den%26sa%3DN%26rls%3Dcom.microsoft:en-us:IE-SearchBox%26biw%3D1259%26bih%3D599%26tbs%3Disch:1&um=1&itbs=1&iact=hc&vpx=638&vpy=65&dur=1219&hovh=225&hovw=225&tx=107&ty=110&ei=RoQVTZC3A8G88ga11Nh-&oei=RoQVTZC3A8G88ga11Nh-&esq=1&page=1&ndsp=18&ved=1t:429,r:3,s:0
And I'm scared Sh**less to put it up there
 
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